Redlines first bike (other then prototypes) was stamped #100. They made just 1,000 Squarebacks. #625 is a 1975 model. They made the Squareback from 1974-76. It should have Redline Northridge, CA decals. It was sometime in 1977 that Redline moved to Chatsworth, CA.
Redline also made 16″ Squarebacks. Just 150 of them.

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